Chemical formula Neon gas?

Neon gas is, simply, Ne.

Yes, just Ne.
From wikipedia: Neon is generally considered to be inert. No true neutral compounds of neon are known. However, the ions Ne+, (NeAr)+, (NeH)+, and (HeNe+) have been observed from optical and mass spectrometric studies, and there are some unverified reports of an unstable hydrate.

Neon Gas Formula

Chemical Symbol For Neon

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RE:
Chemical formula Neon gas?
Is the chemical formula for Neon Gas just Ne? Or does it combine with another element?

Neon is a Noble gas, so yup, just Ne.

No it's just Ne.